<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>超大背景图片</title>
  <style>
    body {
      background-image: url(images/bg.jpg);
      background-repeat: no-repeat;
      /* background-position: center top; */
      background-position: center 40px;
    }
  </style>
</head>

<body>

</body>

</html>